Sup guys, My name is Jan and i'm from West Seneca, New York. I work at Advance Auto Parts and i am the resident bass nut. Not tootin my own horn cause i know there are other people who know a helluvalot more than I do, but i get a fair amount of people coming in asking me about how to wire this or what battery to use and what not. If anyone is in the Western New York area, stop by and look me up, always lookin for someone to talk this kinda stuff with, since most of the guys at my store don't know that much. they usually refer their customer to me if it's an audio question since i pretty much breath this stuff even when i'm at work haha. Anyways, thanks Steve and Dom, now i know how to truly test someone's alternator the correct way, who knew they were teaching me wrongly, i know better now, THANKS SMD!!